“The sun is cold” is a complete declarative sentence: it attributes coldness to the sun. Its having a proposition-like form does not make it true.
Form: it states a judgment about the sun.
Truth: the claim is false.
Conclusion: we may call it a proposition, but we must not confuse a false claim with sound knowledge or correct assent.
Propositional form and truth must be distinguished.
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A complete claim may still be false
Knowledge, Conception and Judgment
“The sun is cold” is a complete declarative sentence: it attributes coldness to the sun. Its having a proposition-like form does not make it true.
Form: it states a judgment about the sun.
Truth: the claim is false.
Conclusion: we may call it a proposition, but we must not confuse a false claim with sound knowledge or correct assent.
Propositional form and truth must be distinguished.